[Speed] performance 0.2.2 released

Hi,

I released performance 0.2.2. Compared to performance 0.1:

• it fixes the --track-memory option, adds a new "show" command,
• enhance "compare" output (display python & performance versions, use sample units: seconds or bytes),
• it isolates again environment variables (fix --inherit-environ cmdline option),
• bugfixes as usual.

Version 0.2.2 (2016-09-19)

• Add a new show command to display a benchmark files
• Issue #11: Display Python version in compare. Display also the performance version.
• CPython issue #26383; csv output: don't truncate digits for timings shorter than 1 us
• compare: Use sample unit of benchmarks, format values in the table output using the unit
• compare: Fix the table output if benchmarks only contain a single sample
• Remove unused -C/--control_label and -E/--experiment_label options
• Update perf dependency to 0.7.11 to get Benchmark.get_unit() and BenchmarkSuite.get_metadata()

Version 0.2.1 (2016-09-10)

• Add --csv option to the compare command
• Fix compare -O table output format
• Freeze indirect dependencies in requirements.txt
• run: add --track-memory option to track the memory peak usage
• Update perf dependency to 0.7.8 to support memory tracking and the new --inherit-environ command line option
• If virtualenv command fail, try another command to create the virtual environment: catch virtualenv error
• The first command to upgrade pip to version >= 6.0 now uses the pip binary rather than python -m pip to support pip 1.0 which doesn't support python -m pip CLI.
• Update Django (1.10.1), Mercurial (3.9.1) and psutil (4.3.1)
• Rename --inherit_env command line option to --inherit-environ and fix it

Version 0.2 (2016-09-01)

• Update Django dependency to 1.10
• Update Chameleon dependency to 2.24
• Add the --venv command line option
• Convert Python startup, Mercurial startup and 2to3 benchmarks to perf scripts (bm_startup.py, bm_hg_startup.py and bm_2to3.py)
• Pass the --affinity option to perf scripts rather than using the taskset command
• Put more installer and optional requirements into performance/requirements.txt
• Cached .pyc files are no more removed before running a benchmark. Use venv recreate command to update a virtual environment if required.
• The broken --track_memory option has been removed. It will be added back when it will be fixed.
• Add performance version to metadata
• Upgrade perf dependency to 0.7.5 to get Benchmark.update_metadata()

Victor